This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A025054 #8 Aug 05 2019 02:06:26 %S A025054 4,7,9,11,14,17,19,21,24,26,28,30,32,35,37,39,41,43,45,47,50,52,54,56, %T A025054 58,61,63,65,68,70,72,74,76,78,80,82,84,86,88,91,93,95,97,99,101,103, %U A025054 105,107,109,111,113,115,118,120,122,124,126,128,130,132,134,136,138,140,142,144,146,148 %N A025054 Positions of even numbers in sequence A025051 (numbers of form j*k + k*i + i*j, without repetitions, where 1 <= i <= j <= k). %Y A025054 Cf. A025051. %K A025054 nonn %O A025054 1,1 %A A025054 _Clark Kimberling_ %E A025054 a(58) onward corrected by _Sean A. Irvine_, Aug 05 2019